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On Cats and Roombas Revisited
On Cats and Roombas Revisited
Describe the change in momentum of the 3.4-kg Roomba if its speed is before and after the cat's interference is 0.28 m/s and the cat's foot is in contact with the Roomba for 0.5 seconds.
What My Dog Can Do
What My Dog Can Do
Find the magnitude of the change in momentum of the 35 kg dog.
Escaped Again
Escaped Again
Find the speed of the cat-surfboard system,
Tennis Ball Bounce
Tennis Ball Bounce
Estimate the average force on the tennis ball during the bounce
An Accidental Bunt
An Accidental Bunt
Coming soon.
Down in Front
Down in Front
Coming soon.
Soccer Hover Puck Bounce
Soccer Hover Puck Bounce
A 0.425 kg hover soccer ball toy bounces off the wall. A student measuring the following:
Incoming velocity: 3.0 m/s at 58.9° with the wall
Outgoing velocity: 2.0 m/s at 46.1° with the wall
Find the magnitude of the impulse imparted to the toy by the wall
Catlike Reflexes
Catlike Reflexes
Coming soon
Ernie Clement throws baseball at Josh Naylor's helmet
Ernie Clement throws baseball at Josh Naylor's helmet
In a recent Game 7 of the American League Championship Series, Ernie Clement threw to first base in an attempt to complete a double play. However, Josh Naylor deliberately got in the way of the throw and took a baseball to the helmet in what was deemed an interference to the play.
Suppose the 0.150 kg ball came in horizontally at 35 m/s and upon contact, leaves Naylor’s helmet at 28 m/s at an angle of 40° above the horizontal. Determine the (a) magnitude and (b) direction of the impulse imparted to the ball as a result of the collision. You may assume that the force exerted by the helmet is much larger than the gravitational force on the ball so that the gravitational force is effectively negligible during the collision.
Ernie Clement throws baseball at Josh Naylor's helmet
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